port and polish intake on heads
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You do not want to have the intake port smooth as glass, the "roughness" aids in a better mixture for combustion. But, there is some degree of "polish" work done after porting .
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Personally I don't do many, so time isn't realtime a factor but I like to bring everything up to a mirror finish so I can easily see any imperfections, then when I'm happy with it I knock the intake side back down with 80 grit and exhaust side to 220-320